Knob



FIG. 1 is a top perspective view of a knob;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevation view;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a front elevation view thereof; and,

FIG. 7 is a rear elevation view thereof.

The broken lines in FIGS. 1-3 and 7 are for the purpose of illustrating boundaries that form no part of the claimed design. 

CLAIM I claim the ornamental design for a knob, as shown and described. 